The hybrid system: A combination of both sofa mechanisms, this consists of pulling, folding, or sliding a frame out to convert the sofa into a mattress. For example, the bottom of your Posting Nordby Pep Sofa Mattress slides out and even more cushions raise to create the sofa bed floor. https://chancewumaw.fitnell.com/71843642/the-basic-principles-of-canopy-for-beds